用递等式计算,能简算的要简算.(18%)(1)25×12-850÷17(2)(3.2÷16+10.8)÷22(3)3.2×12.5×2
用递等式计算,能简算的要简算.(18%)(1)25×12-850÷17(2)(3.2÷16+10.8)÷22(3)3.2×12.5×2.5(4)7.05-3.84-0.1...
用递等式计算,能简算的要简算.(18%)(1)25×12-850÷17(2)(3.2÷16+10.8)÷22(3)3.2×12.5×2.5(4)7.05-3.84-0.16-1.05(5) 8 17 ×9-8÷ 17 8 (6) 5 6 ×[2÷( 7 8 - 3 4 )].
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(1)25×12-850÷17 =25×4×3-50, =300-50, =250; (2)(3.2÷16+10.8)÷22 =(0.2+10.8)÷22, =11÷22, =0.5; (3)3.2×12.5×2.5 =0.8×4×12.5×2.5, =(12.5×0.8)×(2.5×4), =10×10, =100; (4)7.05-3.84-0.16-1.05 =7.05-1.05-(3.84+0.16), =6-4, =2; (5)
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