100道简便运算带答案例题
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100道简便运算带答案例题
1、60×(112+115+14)
=60×112+60×115+60×14
=5+4+15
=24
2、(512-38)×72
=512×72-38×72
=30-27
=3
3、32×125×25
=4×8×125×25
=（4×25）×（8×125）
=100×1000
=100000
9048÷26
=（2600+2600+2600+1248）÷26
=2600÷26+2600÷26+2600÷26+1248÷26
=100+100+100+48
=348
4、2881÷ 43
=（1290+1591）÷ 43
=1290÷43+1591÷43
=30+37 =67 3.2×42.3×3.75-12.5×0.423×16
=3.2×42.3×3.75-1.25×42.3×1.6
=42.3×(3.2×3.75-1.25×1.6)
=42.3×(4×0.8×3.75-1.25×4×0.4)
=42.3×(4×0.4×2×3.75-1.25×4×0.4)
=42.3×(4x0.4x7.5-1.25x4x0.4)
=42.3×[4×0.4×(7.5-1.25)]
=42.3×[4×0.4×6.25]
=42.3×(4×2.5)
=423
5、1.8+18÷1.5-0.5×0.3
=1.8+12-0.15
=13.8-0.15
=13.65
6、6.5×8+3.5×8-47
=52+28-47 =80-47 =33 (80-9.8)×5分之2-1.32
=70.2X25-1.32
=28.08-1.32
=26.76
7、8×7分之4÷[1÷(3.2-2.95)]
=8×47÷[1÷0.25]
=8×47÷4
=87
8、2700×（506－499）÷900
=2700×7÷900
=18900÷900
=21
9、33.02－（148.4－90.85）÷2.5
=33.02－57.55÷2.5
=33.02－23.02
=10
10、（1÷1－1）÷5.1
=（1－1）÷5.1
=0÷5.1
=0
11、18.1＋（3－0.299÷0.23）×1
=18.1＋1.7×1
=18.1＋1.7
=19.8
12、4 +3.2＋5 +6.8
25×(8×0.4)×1.25 7 又415-(2又415 -123)
=4+5+(3.2+6.8) =25×0.4×(8×1.25) =7 又415-2又415
+123
=9+10 =10× 10 =5+123
=19 =100
=5又123
13、(1112+718+524 )×72 93.5÷3又12
÷ 27 16÷2.5
=1112×72+718×72+524×72 =93.5÷72×
72 =16÷52
=66+28+15 =93.5 =16×25
=109
=325
14、1125－997 998+1246+9989
（8700＋870＋87）÷87
=1125-1000+3
=1000-2+1246+10000-11 =8700÷87+870÷
87+87÷87
=125+3 =11000+1246-13 =100+10+1
=128
=12233 =111
15、125×8.8 1.3+4.25+3.7+3.75
17.15-（3.5-2.85）
=125×8+125×0.8
=1.3+3.7+（4.25+3.75） =17.15+2.85-3.5
=1000+100
=5+8 =20-3.5
=1100 =13 =16.5
16、5×41
=25×40+25×1 =1000+25 =1025
17、39×101
=39×100+39×1 =3939
18、56+31+24 =（56+24）+31
=80+31 =111
19、7×80×125 =70×10000 =700000
20、99×99+99 =（99+1）×99 =9900