49.68-(5.6+17.3)用简便方法怎样算简便?
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简便方法有2种:
49.68-(5.6+17.3)有2种简便方法:
① 49.68-(5.6+17.3)
=49.68-22.9
=49.68-23+0.1
=26.68+0.1
=27.68
②49.68-(5.6+17.3)
=49.68-5.6-17.3
=44.08-17.3
=44.08-20+2.7
=26.78
49.68-(5.6+17.3)有2种简便方法:
① 49.68-(5.6+17.3)
=49.68-22.9
=49.68-23+0.1
=26.68+0.1
=27.68
②49.68-(5.6+17.3)
=49.68-5.6-17.3
=44.08-17.3
=44.08-20+2.7
=26.78
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7.6×3/14+17.5×6/25
=11.4/7+21/5
=(11.5*5+21*7)/35
=(57.5+147)/35
=204.5/35
=409/70
=11.4/7+21/5
=(11.5*5+21*7)/35
=(57.5+147)/35
=204.5/35
=409/70
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