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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(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
=85-(84+
=85-84÷7-
=85-12-
=72
(4)
=
=
=
=
(5) 1
=1
=(1
=10×3.6, =36. |
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