解题思路:①运用乘法分配律简算;
②把101看作100+1,运用乘法分配律简算;
③运用减法的性质简算;
④先算除法,再算乘法;
⑤先算括号内的,再算括号外的;
⑥先算除法,再算加法.
①0.6×125+0.4×125,
=(0.6+0.4)×125,
=1×125,
=125;
②101×1.12,
=(100+1)×1.12,
=100×1.12+1.12,
=112+1.12,
=113.12;
③36-12.5-17.5,
=36-(12.5+17.5),
=36-30,
=6;
④9.8÷0.49×0.56,
=20×0.56,
=11.2;
⑤(8.6-6.9)×5.5,
=1.7×5.5,
=9.35;
⑥35.7+3.6÷7.2,
=35.7+0.5,
=36.2.
点评:
本题考点: 小数四则混合运算;运算定律与简便运算.
考点点评: 此题考查了小数的四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算律简便计算.