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1. 直接写出得数。
128 + 32 =
49 + 28 =
323 + 177 =
850 - 47 - 153 =
49 - 16 =
450 ÷ 90 =
3 × 42 =
860 ÷ (27 + 16) =
70 × 31 =
35 × 60 =
500 ÷ 4 =
65 × 102 - 130 =
370 - 99 =
14 × 30 =
232 ÷ 2 =
810 ÷ 27 ÷ 5 =
103 × 7 =
330 × 6 =
304 ÷ 8 =
60 × 12 ÷ 15 =
50 × 15 =
4800 ÷ 16 =
340 - 60 =
437 - (37 + 189) =
340 ÷ 17 =
240 ÷ 240 =
275 ÷ 25 =
5600 ÷ 20 ÷ 5 =
200 ÷ 5 =
34 × 30 =
156 ÷ 13 =
(80 + 4) × 25 =
128 + 32 =
160
49 + 28 =
77
323 + 177 =
500
850 - 47 - 153 =
650
49 - 16 =
33
450 ÷ 90 =
5
3 × 42 =
126
860 ÷ (27 + 16) =
20
70 × 31 =
2170
35 × 60 =
2100
500 ÷ 4 =
125
65 × 102 - 130 =
6500
370 - 99 =
271
14 × 30 =
420
232 ÷ 2 =
116
810 ÷ 27 ÷ 5 =
6
103 × 7 =
721
330 × 6 =
1980
304 ÷ 8 =
38
60 × 12 ÷ 15 =
48
50 × 15 =
750
4800 ÷ 16 =
300
340 - 60 =
280
437 - (37 + 189) =
211
340 ÷ 17 =
20
240 ÷ 240 =
1
275 ÷ 25 =
11
5600 ÷ 20 ÷ 5 =
56
200 ÷ 5 =
40
34 × 30 =
1020
156 ÷ 13 =
12
(80 + 4) × 25 =
2100
答案
160 77 500 650 33 5 126 20 2170 2100 125 6500 271 420 116 6 721 1980 38 48 750 300 280 211 20 1 11 56 40 1020 12 2100
2. 计算下面各题,能简算的要简算。
16 + 135 + 84 + 165
478 - 145 ÷ 5 × 6
185 × 38 + 38 × 15
320 × 3 - 540 ÷ 6
16 × (75 - 25) ÷ 40
720 ÷ [(169 + 77) ÷ 41]
16 + 135 + 84 + 165
478 - 145 ÷ 5 × 6
185 × 38 + 38 × 15
320 × 3 - 540 ÷ 6
16 × (75 - 25) ÷ 40
720 ÷ [(169 + 77) ÷ 41]
答案
400 304 7600 870 20 120
解析
16+135+84+165
=(16+84)+(135+165)
=100+300
=400
478-145÷5×6
=478-29×6
=478-174
=304
185×38+38×15
=38×(185+15)
=38×200
=7600
320×3-540÷6
=960-90
=870
16×(75-25)÷40
=16×50÷40
=800÷40
=20
720÷[(169+77)÷41]
=720÷[246÷41]
=720÷6
=120
=(16+84)+(135+165)
=100+300
=400
478-145÷5×6
=478-29×6
=478-174
=304
185×38+38×15
=38×(185+15)
=38×200
=7600
320×3-540÷6
=960-90
=870
16×(75-25)÷40
=16×50÷40
=800÷40
=20
720÷[(169+77)÷41]
=720÷[246÷41]
=720÷6
=120
3. 看图列式计算。
(1)
(2)
(3)
(1)
(2)
(3)
答案
（1）12×15÷10=18(cm)
（2）100×2÷25=8(dm)
（3）60×2÷8-10=5(m)
（2）100×2÷25=8(dm)
（3）60×2÷8-10=5(m)
