脱式:①55分之4×56②79×10.1③4.3-2.82+6.7-6.12
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题目内容:
脱式:①55分之4×56 ②79×10.1 ③4.3-2.82+6.7-6.12
优质解答
4/55x56
=4/55x(55+1)
=4/55x55+4/55x1
=4+4/55
=4又55分之4
79x10.1
=79x(10+0.1)
=79x10+79x0.1
=790+7.9
=797.9
4.3-2.82+6.7-6.12
=(4.3+6.7)-(2.82+6.12)
=11-8.94
=2.06
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