题目内容
用递等式计算.(能简算的要简算)
(1)506÷46+1334÷46
(2)124×63+37×124
(3)23×76-(710+38)
(4)5600÷(184+11×56)
(1)506÷46+1334÷46
(2)124×63+37×124
(3)23×76-(710+38)
(4)5600÷(184+11×56)
分析:(1)运用除法的性质简算;
(2)运用乘法分配律简算;
(3)先算乘法和括号内的,再算减法;
(4)先算括号内的乘法,再算括号内的加法,最后算括号外的除法.
(2)运用乘法分配律简算;
(3)先算乘法和括号内的,再算减法;
(4)先算括号内的乘法,再算括号内的加法,最后算括号外的除法.
解答:解:(1)506÷46+1334÷46,
=(506+1334)÷46
=1840÷46,
=40;
(2)124×63+37×124,
=(63+37)×124,
=100×124,
=12400;
(3)23×76-(710+38),
=1748-748,
=1000;
(4)5600÷(184+11×56),
=5600÷(184+616),
=5600÷800,
=7.
=(506+1334)÷46
=1840÷46,
=40;
(2)124×63+37×124,
=(63+37)×124,
=100×124,
=12400;
(3)23×76-(710+38),
=1748-748,
=1000;
(4)5600÷(184+11×56),
=5600÷(184+616),
=5600÷800,
=7.
点评:此题主要考查整数的四则混合运算的运算顺序和应用运算定律进行简便计算.
练习册系列答案
相关题目