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简便计算：16.4+3.5+83.6+166.59.16-5.72-1.2864×12.5×0.25×0.05312.5×12.3-312.5×6.9+312.5123+234+345+…+979899+9899100313+524+735+…+1959799+19798100．
题目详情
简便计算：
16.4+3.5+83.6+166.5
9.16-5.72-1.28
64×12.5×0.25×0.05
312.5×12.3-312.5×6.9+312.5
．简便计算：
16.4+3.5+83.6+166.5
9.16-5.72-1.28
64×12.5×0.25×0.05
312.5×12.3-312.5×6.9+312.5
．
．
1
+2
+3
+…+97
+98
3
+5
+7
+…+195
+197
1
+2
+3
+…+97
+98
1
+2
+3
+…+97
+98
2 3 2 2 3 3
3 4 3 3 4 4
4 5 4 4 5 5
98 99 98 98 99 99
99 100 99 99 100 100 3
+5
+7
+…+195
+197
3
+5
+7
+…+195
+197
1 3 1 1 3 3
2 4 2 2 4 4
3 5 3 3 5 5
97 99 97 97 99 99
98 100 98 98 100 100
16.4+3.5+83.6+166.5
9.16-5.72-1.28
64×12.5×0.25×0.05
312.5×12.3-312.5×6.9+312.5
1
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3
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16.4+3.5+83.6+166.5
9.16-5.72-1.28
64×12.5×0.25×0.05
312.5×12.3-312.5×6.9+312.5
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| 97 |
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| 100 |
| 1 |
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| 97 |
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▼优质解答
答案和解析
（1）16.4+3.5+83.6+166.5
=（16.4+83.6）+（3.5+166.5）
=100+170
=270；
（2）9.16-5.72-1.28
=9.16-（5.72+1.28）
=9.16-7
=2.16；
（3）64×12.5×0.25×0.05
=（2×4×8）×12.5×0.25×0.05
=（2×0.05）×（4×0.25）×（8×12.5）
=0.1×1×100
=10；
（4）312.5×12.3-312.5×6.9+312.5
=312.5×（12.3-6.9+1）
=312.5×6.4
=（300+12.5）×6.4
=300×6.4+12.5×6.4
=1920+80
=2000；
（5）
=
=
=
=
．
1
+2
+3
+…+97
+98
3
+5
+7
+…+195
+197
1
+2
+3
+…+97
+98
1
+2
+3
+…+97
+98
1
2 3 2 2 23 3 3+2
3 4 3 3 34 4 4+3
4 5 4 4 45 5 5+…+97
98 99 98 98 9899 99 99+98
99 100 99 99 99100 100 1003
+5
+7
+…+195
+197
3
+5
+7
+…+195
+197
3
1 3 1 1 13 3 3+5
2 4 2 2 24 4 4+7
3 5 3 3 35 5 5+…+195
97 99 97 97 9799 99 99+197
98 100 98 98 98100 100 100
=
=
=
=
．
+
+
+…+
+
+
+
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5 3 5 5 53 3 3+
11 4 11 11 114 4 4+
19 5 19 19 195 5 5+…+
9701 99 9701 9701 970199 99 99+
9899 100 9899 9899 9899100 100 100
+
+
+…+
+
+
+
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+
10 3 10 10 103 3 3+
22 4 22 22 224 4 4+
38 5 38 38 385 5 5+…+
19402 99 19402 19402 1940299 99 99+
19798 100 19798 19798 19798100 100 100
=
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5 3 5 5 53 3 3+
11 4 11 11 114 4 4+
19 5 19 19 195 5 5+…+
9701 99 9701 9701 970199 99 99+
9899 100 9899 9899 9899100 100 100
×2+
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5 3 5 5 53 3 3×2+
11 4 11 11 114 4 4×2+
19 5 19 19 195 5 5×2+…+
9701 99 9701 9701 970199 99 99×2+
9899 100 9899 9899 9899100 100 100×2
=
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5 3 5 5 53 3 3+
11 4 11 11 114 4 4+
19 5 19 19 195 5 5+…+
9701 99 9701 9701 970199 99 99+
9899 100 9899 9899 9899100 100 100(
+
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5 3 5 5 53 3 3+
11 4 11 11 114 4 4+
19 5 19 19 195 5 5+…+
9701 99 9701 9701 970199 99 99+
9899 100 9899 9899 9899100 100 100)×2
=
．
1 2 1 1 12 2 2．
=（16.4+83.6）+（3.5+166.5）
=100+170
=270；
（2）9.16-5.72-1.28
=9.16-（5.72+1.28）
=9.16-7
=2.16；
（3）64×12.5×0.25×0.05
=（2×4×8）×12.5×0.25×0.05
=（2×0.05）×（4×0.25）×（8×12.5）
=0.1×1×100
=10；
（4）312.5×12.3-312.5×6.9+312.5
=312.5×（12.3-6.9+1）
=312.5×6.4
=（300+12.5）×6.4
=300×6.4+12.5×6.4
=1920+80
=2000；
（5）
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=
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