计算下面各题,能简算的要简算.(1)10÷8+3.96×12.5%+2.04× 2 16 (2)6000-105×36(3)
计算下面各题,能简算的要简算.(1)10÷8+3.96×12.5%+2.04×216(2)6000-105×36(3)85-8478÷7(4)415÷[(47+421)×...
计算下面各题,能简算的要简算.(1)10÷8+3.96×12.5%+2.04× 2 16 (2)6000-105×36(3)85-84 7 8 ÷7 (4) 4 15 ÷[( 4 7 + 4 21 )× 7 12 ] (5) 1 6 7 ×3.6+3 3 5 ×7 1 7 +3.6 .
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宽净灯t
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(1)10÷8+3.96×12.5%+2.04× =1.25+3.96×12.5%+2.04×0.125, =0.125×10+3.96×0.125+2.04×0.125, =(10+3.96+2.04)×0.125, =16×0.125, =2; (2)6000-105×36 =6000-(100+5)×36, =6000-100×36-36×5, =6000-3600-180, =2220; (3)85-84 ÷7 =85-(84+ )÷7, =85-84÷7- ÷ 7, =85-12- , =72 ; (4) ÷[( + )× ] = ÷[ × + × ], = ÷[ + ], = × , = ; (5) 1 ×3.6+3 ×7 +3.6 =1 ×3.6+3.6×7 +3.6, =(1 +7 +1)×3.6, =10×3.6, =36. |
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