×125××8++×24×(-)÷3÷+3÷7+8.9+2+6.10.36×10120-(5.6+4.8)÷1.33.2×(2.15+1.95÷6.5)(+)÷+36×(+-)
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解:①×125××8
=(×8)×(×125),
=2×1,
=1;②++×24
=+4,
=;
③×(-)÷
=××,
=;④3÷+3÷
=×+,
=+,
=;
⑤7+8.9+2+6.1
=(+)+(8.9+6.1),
=10+15,
=15;
⑥0.36×101
=0.36×100+0.36,
=36+0.36,
=36.36;
⑦20-(5.6+4.8)÷1.3
=20-10.4÷1.3,
=20-8,
=12;
⑧3.2×(2.15+1.95÷6.5)
=3.2×(2.15+0.3),
=3.2×2.45,
=7.84;
⑨(+)÷+
=×+,
=+,
=;
⑩36×(+-)
=36×+36×-36×
=9+6-12,
=3.
解析分析:本题据四则混合运算法则计算即可:先算乘除,再算加减,有括号的要先算括号里面的.同时要认真分析式中数据,能简算的要简算.
点评:完成此类题目要细心分析数据,然后据计算法则和运算定律完成.