脱式计算,能简便的要用简便方法计算756÷[4×(56-35)]99×4.3+9...
脱式计算,能简便的要用简便方法计算756÷[4×(56-35)]99×4.3+99(34-27)×15+23543.5-7.61-3.535÷25×35÷250.25×4...
脱式计算,能简便的要用简便方法计算 756÷[4×(56-35)]99×4.3+99 (34-27)×15+23543.5-7.61-3.5 35÷25×35÷25 0.25×4.83+4.17÷4
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解:(1)756÷[4×(56-35)]
=756÷[4×21]
=756÷84
=9;
(2)99×4.3+99
=99×(4.3+1)
=99×5.3
=(100-1)×5.3
=100×5.3-1×5.3
=530-5.3
=524.7;
(3)(34-27)×15+235
=1328×15+235
=13140+235
=320;
(4)43.5-7.61-3.5
=43.5-3.5-7.61
=40-7.61
=32.39;
(5)35÷25×35÷25
=32×35÷25
=910÷25
=94;
(6)0.25×4.83+4.17÷4
=0.25×4.83+4.17×0.25
=0.25×(4.83+4.17)
=0.25×9
=2.25.
=756÷[4×21]
=756÷84
=9;
(2)99×4.3+99
=99×(4.3+1)
=99×5.3
=(100-1)×5.3
=100×5.3-1×5.3
=530-5.3
=524.7;
(3)(34-27)×15+235
=1328×15+235
=13140+235
=320;
(4)43.5-7.61-3.5
=43.5-3.5-7.61
=40-7.61
=32.39;
(5)35÷25×35÷25
=32×35÷25
=910÷25
=94;
(6)0.25×4.83+4.17÷4
=0.25×4.83+4.17×0.25
=0.25×(4.83+4.17)
=0.25×9
=2.25.
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