题目内容
| 16×6+36 | 14×15-120 | 500-42×5 | 18+12×6 |
| 72÷2-16 | 84÷7+66 | 148-48÷6 | 48+112÷7 |
| 6×8+7×9 | 8×7-2×9 | 24÷2+24×2 | 93÷3-645÷4 |
| 66÷3+72÷4 | 12×8-108÷6 |
分析:(1)(4)(9)先算乘法,再算加法;
(2)(3)(10)先算乘法,再算减法;
(5)(7)先算除法,再算减法;
(6)(8)(13)先算除法,再算加法;
(11)先算乘除,再算加法;
(14)先算乘除,再算减法.
(2)(3)(10)先算乘法,再算减法;
(5)(7)先算除法,再算减法;
(6)(8)(13)先算除法,再算加法;
(11)先算乘除,再算加法;
(14)先算乘除,再算减法.
解答:解:(1)16×6+36
=96+36
=132;
(2)14×15-120
=210-120
=90;
(3)500-42×5
=500-210
=290;
(4)18+12×6
=18+72
=90;
(5)72÷2-16
=36-16
=20;
(6)84÷7+66
=12+66
=78;
(7)148-48÷6
=148-8
=140;
(8)48+112÷7
=48+16
=64;
(9)6×8+7×9
=48+63
=111;
(10)8×7-2×9
=56-18
=38;
(11)24÷2+24×2
=12+48
=60;
(12)93÷3-645÷4
=31-161.25
=-130.25;
(13)66÷3+72÷4
=22+18
=40;
(14)12×8-108÷6
=96-18
=78.
=96+36
=132;
(2)14×15-120
=210-120
=90;
(3)500-42×5
=500-210
=290;
(4)18+12×6
=18+72
=90;
(5)72÷2-16
=36-16
=20;
(6)84÷7+66
=12+66
=78;
(7)148-48÷6
=148-8
=140;
(8)48+112÷7
=48+16
=64;
(9)6×8+7×9
=48+63
=111;
(10)8×7-2×9
=56-18
=38;
(11)24÷2+24×2
=12+48
=60;
(12)93÷3-645÷4
=31-161.25
=-130.25;
(13)66÷3+72÷4
=22+18
=40;
(14)12×8-108÷6
=96-18
=78.
点评:混合运算抓住运算顺序,正确按运算顺序计算即可.
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