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解方程、简便运算强化训练
一、解方程。
3X=83 X ÷72=16
7
125 ÷X=310
4X =30% 53 X = 7225
X-0.25=4
1
X ×53=20×41 50% X + 54 X = 3.6 25% X + 15%X = 5
4
X - 15%X = 68 X - 27 X =4
3
X +83X =121
X +87X=43 21 X + 61 X = 4 X+4
1
X=20
6X +5 =13.4 4 X -6=38 43X+41=8
3
4 X -3 ×9 = 29 5X -3×215=7
5 4X -6×3
2
=2
0.36×5- 34 X = 35 X - 0.8 X = 16+6 2
3 ( X - 4.5) = 7
32X ÷41
=12 2(X-2.6)=8 25 X-13 X=310
X ×( 16 + 38 )=1312 X -0.375 X =6
5
20 X – 8.5= 1.5
X - 45 X -4= 21 4+0.7X=102 1
2 X - 25% X = 10
二、简便运算。
(712 - 15 )×60 36×34
35
0.65×101 (1.25-0.125)×8 2538 ×8 24×(1211-83-61-3
1
)
(12+7
2
) ×7 13×10.2 2.6×99
47 ×613 +37 ×613 27.5×3.7-7.5×3.7 97÷511+97×115 710 ×101- 710 35 × 99 + 35 516×137-53÷7
13
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257×103-257×2-25
7 0.92×1.41+0.92×8.59
2.25×4.8+77.5×0.48 4.8×7.8+78×0.52 1.3×11.6-1.6×1.3
227 ×(15×2728 )×2
15 4.36×12.5×8 2.5×32×1.25 1.25÷
3
2
×0.8 9.6÷3.2÷3 15.2÷0.25÷4 89 ×89 ÷89 ×89 83×3÷83
×3 146.5-(23+46.5) 12.89-(3.89-1.6) 73.8-1.64-13.8-5.36 15.75+3.59-0.59+14.25
5.48-(9.4-0.52) 12.06+5.07+2.94 30.34+9.76-10.34
二、简便运算。
(712 - 15 )×
60 36×3435 0.65×101 (1.25-0.125)×
8 2538 ×8 24×( - - - ) (12+ ) ×7 13×10.2 2.6×99 X - 45 X
-4= 21
47 ×613 +37 ×613 27.5×3.7-7.5×3.7 0.92×1.41+0.92×8.59 710 ×101- 710 35 × 99 + 35 30.34+9.76-10.34 2.25×4.8+77.5×0.48 4.8×7.8+78×0.52 1.3×11.6-1.6×1.3 227 ×(15×2728 )×215 4.36×12.5×8 2.5×32×1.25 1.25÷ ×0.8 9.6÷3.2÷3 15.2÷0.25÷4
89 ×89 ÷89 ×89 12.06+5.07+2.94 146.5-(23+46.5) 12.89-(3.89-1.6)
73.8-1.64-13.8-5.36
15.75+3.59-0.59+14.25
5.48-(9.4-0.52) 4 X -3 ×9 = 29 5X -3× = 4X -6× =2
0.36×5- 34 X = 35 X - 0.8 X = 16+6 23 ( X - 4.5) = 7
X ÷ =12 2(X-2.6)=8 25 X-13 X=310 4+0.7X=102
X ×( 16 + 38 )=1312 X -0.375 X = 20 X – 8.5= 1.5 12 X - 25% X = 10 二、简便运算。
(712 - 15 )×
60 36×3435 0.65×101 35 × 99 + 35
(1.25-0.125)×
8 2538 ×8 710 ×101- 710