(2007•淮安模拟)下面各题怎样简便就怎样算 14.4÷0.125÷8 (16
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(2007•淮安模拟)下面各题怎样简便就怎样算
14.4÷0.125÷8 | (
(1)14.4÷0.125÷8,
=14.4÷(0.125×8), =14.4÷1, =14.4; (2)( 1 6+ 1 8)×24× 1 5, = 1 6×24× 1 5+ 1 8×24× 1 5, = 4 5+ 3 5, = 7 5; (3)2.34×56-23.4×5.6, =2.34×56-2.34×56 =2.34×(56-56), =0; (4)1.5× 4 5+0.8×5.5+2× 4 5, =1.5×0.8+0.8×5.5+2×0.8, =(1.5+5.5+2)×0.8, =9×0.8, =7.2; (5)1005÷[42×( 5 6- 5 7)], =1005÷[42× 5 6-42× 5 7], =1005÷[35-30], =1005÷5, =201; (6) 12 35÷[1-( 1 5+ 1 7)], = 12 35÷[1- 12 35], = 12 35÷ 24 35, = 12 35× 35 24, = 1 2. |