计算下面各题,能简算的必须简算14.8-6.46-3.54 3 5 ÷6× 10 7 ( 7 9
计算下面各题,能简算的必须简算14.8-6.46-3.5435÷6×107(79+56-14)×721823÷85+1823×381.25×6.9×813÷(14+56)...
计算下面各题,能简算的必须简算14.8-6.46-3.54 3 5 ÷6× 10 7 ( 7 9 + 5 6 - 1 4 )×72 18 23 ÷ 8 5 + 18 23 × 3 8 1.25×6.9×8 13÷( 1 4 + 5 6 )× 3 4 .
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悉伤774
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(1)14.8-6.46-3.54 =14.8-(6.46+3.54) =14.8-10 =4.8;
(2) ÷6× = × = ;
(3)( + - )×72 = ×72+ ×72- ×72 =56+60-18 =116-18 =98;
(4) ÷ + × = × + × = ×( + ) = ×1 = ;
(5)1.25×6.9×8 =1.25×8×6.9 =10×6.9 =69;
(6) 13÷( + )× =13÷ × =12× =9. |
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