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14 soalan untuk mengukuhkan unit Darab Wang. Jika salah, baca petunjuk dan cuba lagi.
RM 15.40 × 5 = ?
| 1 | 5 | . | 4 | 0 | |
| × | 5 | ||||
| ? | ? | ? | ? | ? |
sen 乘后刚好整数 = hasil sen cukup ringgit
40 × 5 = 200 sen = RM 2,sen 写 00,进 2。15 × 5 = 75,加 2 得 77。答案 RM 77。
例子:RM 2.20 × 5 → 100 sen = RM 1,10 + 1 = RM 11。
注意:RM 75 是忘了进位的 2。
sen multiplying to whole ringgit = hasil sen cukup ringgit
40 × 5 = 200 sen = RM 2, so write 00 in the sen place and carry 2. 15 × 5 = 75, plus 2 gives 77. The answer is RM 77.
Example: RM 2.20 × 5 → 100 sen = RM 1, then 10 + 1 = RM 11.
Watch out: RM 75 leaves out the carried 2.
RM 46.85 × 2 = ?
| 4 | 6 | . | 8 | 5 | |
| × | 2 | ||||
| ? | ? | ? | ? | ? |
乘 2 = darab 2
85 × 2 = 170 sen = 1 ringgit 70 sen,写 70,进 1。46 × 2 = 92,加 1 得 93。答案 RM 93.70。
例子:RM 7.60 × 2 → 120 sen → 20 进 1 → 14 + 1 = RM 15.20。
注意:RM 92.70 是漏了进位的 1。
times 2 = darab 2
85 × 2 = 170 sen = 1 ringgit 70 sen, write 70 and carry 1. 46 × 2 = 92, plus 1 gives 93. The answer is RM 93.70.
Example: RM 7.60 × 2 → 120 sen → write 20, carry 1 → 14 + 1 = RM 15.20.
Watch out: RM 92.70 misses the carried 1.
RM 128.75 × 4 = ?
| 1 | 2 | 8 | . | 7 | 5 | |
| × | 4 | |||||
| ? | ? | ? | ? | ? | ? |
三位 ringgit 乘一位数 = tiga digit ringgit darab satu digit
75 × 4 = 300 sen = RM 3,sen 写 00,进 3。128 × 4 = 512,加 3 得 515。答案 RM 515。
例子:RM 110.25 × 4 → 100 sen = RM 1,440 + 1 = RM 441。
注意:RM 515.75 是把 75 sen 照抄,没有乘 4。
three ringgit digits times one digit = tiga digit ringgit darab satu digit
75 × 4 = 300 sen = RM 3, write 00 and carry 3. 128 × 4 = 512, plus 3 gives 515. The answer is RM 515.
Example: RM 110.25 × 4 → 100 sen = RM 1, then 440 + 1 = RM 441.
Watch out: RM 515.75 copies the 75 sen instead of multiplying them by 4.
RM 1 045.30 × 9 = ?
| 1 | 0 | 4 | 5 | . | 3 | 0 | |
| × | 9 | ||||||
| ? | ? | ? | ? | ? | ? | ? |
四位 ringgit 乘 9 = empat digit ringgit darab 9
30 × 9 = 270 sen = 2 ringgit 70 sen,写 70,进 2。1 045 × 9 = 9 405,加 2 得 9 407。答案 RM 9 407.70。
例子:RM 1 002.10 × 9 → 90 sen,9 018 → RM 9 018.90。
注意:RM 9 405.70 是忘了把进位的 2 加进去。
four ringgit digits times 9 = empat digit ringgit darab 9
30 × 9 = 270 sen = 2 ringgit 70 sen, write 70 and carry 2. 1 045 × 9 = 9 405, plus 2 gives 9 407. The answer is RM 9 407.70.
Example: RM 1 002.10 × 9 → 90 sen and 9 018 → RM 9 018.90.
Watch out: RM 9 405.70 forgets to add the carried 2.
RM 2 360 × 3 = ?
| 2 | 3 | 6 | 0 | |
| × | 3 | |||
| ? | ? | ? | ? |
整数金额乘 = darab nombor bulat
没有 sen,直接像普通乘法:0 × 3 = 0;6 × 3 = 18,写 8 进 1;3 × 3 = 9,加 1 是 10,写 0 进 1;2 × 3 = 6,加 1 是 7。答案 RM 7 080。
例子:RM 1 250 × 3 = RM 3 750。
注意:百位算出 10 时要写 0 再进 1,别把 10 整个写下去。
multiplying a whole amount = darab nombor bulat
There are no sen, so multiply like ordinary numbers: 0 × 3 = 0; 6 × 3 = 18, write 8 and carry 1; 3 × 3 = 9, plus 1 is 10, write 0 and carry 1; 2 × 3 = 6, plus 1 is 7. The answer is RM 7 080.
Example: RM 1 250 × 3 = RM 3 750.
Watch out: when the hundreds give 10, write 0 and carry 1; do not write the whole 10.
RM 3.70 × ? = RM 37
找乘数 = cari pendarab;移 1 位 = gerak 1 tempat
从 3.70 到 37,数字 3、7 没有变,只是小数点向右移了 1 位(3.70 → 37.0)。移 1 位就是乘 10,所以方框是 10。检查:RM 3.70 × 10 = RM 37,没错。
例子:RM 2.50 × □ = RM 25 → 移 1 位 → 10。
注意:数小数点移了几位,就知道乘的是 10、100 还是 1000。
finding the multiplier = cari pendarab
From 3.70 to 37 the decimal point moved 1 place to the right (3.70 → 37.0), and 1 place means times 10. So the box is 10.
Example: RM 2.50 × □ = RM 25 → 1 place → 10.
Watch out: count how many places the point moved to know whether it is 10, 100 or 1000.
RM 5.45 × ? = RM 545
移两位 = gerak dua tempat;乘 100 = darab 100
5.45 变成 545,数字 5、4、5 没有变,小数点向右移了 2 位。移 2 位就是乘 100,所以方框是 100。检查:RM 5.45 × 100 = RM 545,没错。
例子:RM 1.25 × □ = RM 125 → 100。
注意:数字 5、4、5 没有变,只有小数点的位置变了。
moving two places = gerak dua tempat
5.45 became 545, so the decimal point moved 2 places to the right, which means times 100. The box is 100.
Example: RM 1.25 × □ = RM 125 → 100.
Watch out: the digits 5, 4, 5 do not change; only the position of the point changes.
RM 8.20 × 1000 = ?
乘 1000 补 0 = darab 1000, isi sifar
1000 有三个 0,小数点要向右移三位:8.20 只有两位小数,移到第三位时没有数字,就补一个 0,得 8200。答案 RM 8 200,千位用空格隔开。
例子:RM 6.40 × 1000 = RM 6 400。
注意:补的 0 放在最后,RM 8 020 是放错位置。
times 1000 with a filler zero = darab 1000, isi sifar
Move the decimal point three places to the right: 8.20 has only two decimal digits, so the third place gets a 0, giving 8200. The answer is RM 8 200.
Example: RM 6.40 × 1000 = RM 6 400.
Watch out: the filler 0 goes at the end; RM 8 020 puts it in the wrong place.
Sebungkus kuih berharga RM 12.50. Berapakah harga 8 bungkus kuih?
8 包糕点 = 8 bungkus kuih
总价 = RM 12.50 × 8。sen:50 × 8 = 400 sen = RM 4,写 00,进 4。ringgit:12 × 8 = 96,加 4 得 100。答案 RM 100。
例子:6 包,每包 RM 2.50 → 300 sen = RM 3,12 + 3 = RM 15。
注意:RM 96 是漏了 sen 乘出来的 RM 4。
8 packets of kuih = 8 bungkus kuih
The total is RM 12.50 × 8. Sen: 50 × 8 = 400 sen = RM 4, write 00 and carry 4. Ringgit: 12 × 8 = 96, plus 4 gives 100. The answer is RM 100.
Example: 6 packets at RM 2.50 each → 300 sen = RM 3, then 12 + 3 = RM 15.
Watch out: RM 96 misses the RM 4 that came from the sen.
Harga sebuah kerusi ialah RM 125.60. Berapakah harga 4 buah kerusi?
4 张椅子 = 4 buah kerusi
总价 = RM 125.60 × 4。sen:60 × 4 = 240 sen = 2 ringgit 40 sen,写 40,进 2。ringgit:125 × 4 = 500,加 2 得 502。答案 RM 502.40。
例子:3 张桌子,每张 RM 80.30 → 90 sen,240 → RM 240.90。
注意:RM 500.40 是忘了加进位的 2。
4 chairs = 4 buah kerusi
The total is RM 125.60 × 4. Sen: 60 × 4 = 240 sen = 2 ringgit 40 sen, write 40 and carry 2. Ringgit: 125 × 4 = 500, plus 2 gives 502. The answer is RM 502.40.
Example: 3 tables at RM 80.30 each → 90 sen and 240 → RM 240.90.
Watch out: RM 500.40 forgets to add the carried 2.
Sebuah kedai menjual 6 buah basikal pada harga RM 480 sebuah. Berapakah jumlah jualan?
总销售额 = jumlah jualan
总额 = RM 480 × 6。0 × 6 = 0;8 × 6 = 48,写 8 进 4;4 × 6 = 24,加 4 得 28。答案 RM 2 880。
例子:5 辆,每辆 RM 320 → RM 1 600。
注意:RM 2 840 是十位忘了进 4。
total sales = jumlah jualan
The total is RM 480 × 6. 0 × 6 = 0; 8 × 6 = 48, write 8 and carry 4; 4 × 6 = 24, plus 4 gives 28. The answer is RM 2 880.
Example: 5 bicycles at RM 320 each → RM 1 600.
Watch out: RM 2 840 forgets the 4 carried from the tens.
Yang manakah hasil darabnya lebih daripada RM 1 000?
比较积的大小 = banding hasil darab
每个都算一算:RM 2.50 × 1000 = RM 2 500;RM 45 × 10 = RM 450;RM 9.90 × 100 = RM 990。只有 RM 2 500 超过 RM 1 000。
例子:RM 3 × 100 = RM 300,不到 RM 1 000。
注意:RM 990 很接近 1 000,但还是比 1 000 少。
comparing products = banding hasil darab
Work out each one: RM 2.50 × 1000 = RM 2 500; RM 45 × 10 = RM 450; RM 9.90 × 100 = RM 990. Only RM 2 500 is more than RM 1 000.
Example: RM 3 × 100 = RM 300, which is under RM 1 000.
Watch out: RM 990 is close to 1 000 but still less than it.
Yang manakah hasil darabnya lebih daripada RM 500?
找超过 RM 500 的 = cari yang lebih daripada RM 500
RM 65 × 10 = RM 650;RM 150 × 3 = RM 450;RM 3.20 × 100 = RM 320。只有 RM 650 超过 RM 500。
例子:RM 52 × 10 = RM 520,超过 500。
注意:先算出每个答案再比较,不要只看乘数大小。
finding the one over RM 500 = cari yang lebih daripada RM 500
RM 65 × 10 = RM 650; RM 150 × 3 = RM 450; RM 3.20 × 100 = RM 320. Only RM 650 is more than RM 500.
Example: RM 52 × 10 = RM 520, which is over 500.
Watch out: work out every answer before comparing; do not judge by the size of the multiplier alone.
RM 19.50 × 4 = ?
横式乘法 = darab bentuk ayat
不用竖式也可以:50 × 4 = 200 sen = RM 2;19 × 4 = 76;76 + 2 = 78。答案 RM 78。
例子:RM 9.50 × 4 → RM 2 + 36 = RM 38。
注意:RM 76 是只乘了 ringgit,没有算 sen。
multiplying in a line = darab bentuk ayat
It can be done without columns: 50 × 4 = 200 sen = RM 2; 19 × 4 = 76; 76 + 2 = 78. The answer is RM 78.
Example: RM 9.50 × 4 → RM 2 + 36 = RM 38.
Watch out: RM 76 multiplies only the ringgit and leaves out the sen.
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