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脱式计算 怎样简便就怎样算①(12-14)÷13+16②34÷910-514×715③89×
问题详情
脱式计算,怎样简便就怎样算 ①(12-14)÷13+16,
①(1 2- 1 4)÷ 1 3+ 1 6
②3 4÷ 9 10- 5 14× 7 15
③8 9×[ 3 4-( 7 16- 1 4)]
④102×98 101
⑤4 5- 5 9+ 1 5- 4 9
⑥8 13÷7+ 1 7× 5 13.
参考答案
=14×3+16,
=912+212,
=1112;
②34÷910-514×715,
=34×109-514×715,
=56-16,
=23;
③89×[34-(716-14)],
=89×[34-316],
=89×916,
=12;
④102×98101,
=(101+1)×98101,
=101×98101+1×98101,
=98+98101,
=9898101;
⑤45-59+15-49,
=(45+15)-(59+49),
=1-1,
=0;
⑥813÷7+17×513,
=813×17+17×513,
=17×(513+813),
=17×1,
=17.考点: