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) 15.75+3.59-0.59+14.25
5.48-(9.4-0.52) =2
0.36×5- 34 X = 35
X÷ =12 4+0.7X=102
4 X-3 ×9 = 29 X - 0.8 X = 16+6 2(X-2.6)=8 5X-3× = 73.8-1.64-13.8-5.36 4X-6× 23 ( X - 4.5) = 7 25 X-13 X=310
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 + 35
(1.25-0.125)×
8 27.5×3.7-7.5×3.7
(12+ ) ×7 ×101- 710
47 ×613 +37 ×613
36×3435 2538 ×8 ×10.2 0.92×1.41+0.92×8.59 0.65×101 2.6×99 35 × 99 710 ×101- 710 710 13
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 1.25÷ ×0.8
89 ×89 ÷89 ×89
12.89-(3.89-1.6)
125×36×25
4.36×12.5×8 2.5×32×1.25 9.6÷3.2÷3 15.2÷0.25÷4 ×3÷ ×3 146.5-(23+46.5)73.8-1.64-13.8-5.36 15.75+3.59-0.59+14.25 31/30×31 5.48-(9.4-0.52) 12.06+5.07+2.94 30.34+9.76-10.34
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