分析:分別算出左右兩邊算式的結(jié)果,然后再進一步解答.
解答:解:(1)(4+8)×25,
=4×25+8×25,
=100+200,
=300;
(2)180÷36,
=180÷(18×2),
=180÷18÷2,
=10÷2,
=5;
(3)246-(146+32),
=246-146-32,
=100-32,
=68;
(4)43+87+37+13,
=(43+57)+(87+13),
=100+100,
=200;
(5)28×34-34×18,
=34×(28-18),
=34×10,
=340;
(6)3×(4×25),
=3×100,
=300;
(7)(43+57)+(87+13),
=100+100,
=200;
(8)246-146-32,
=100-32,
=68;
(9)34×(28-18),
=34×10,
=340;
(10)180÷9÷4,
=20÷4,
=5.
故答案為:
.
點評:此題主要考查整數(shù)的四則混合運算的運算順序和應(yīng)用運算定律進行簡便計算.