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怎样简便怎样算312×4+188×425×33×4101×874000÷25-13×1264-(7.2+5.9)(75+240)÷(20-5)85.7-(15.3-4.8)51.27-8.66-1.3410.75+0.4-9.86.
题目详情
怎样简便怎样算 312×4+188×4 | 25×33×4 |
101×87 | 4000÷25-13×12 |
64-(7.2+5.9) | (75+240)÷(20-5) |
85.7-(15.3-4.8) | 51.27-8.66-1.34 |
10.75+0.4-9.86. |
▼优质解答
答案和解析
(1)312×4+188×4
=(312+188)×4
=500×4
=2000;
(2)25×33×4
=25×4×33
=100×33
=3300;
(3)101×87
=(100+1)×87
=100×87+1×87
=8787;
(4)4000÷25-13×12
=160-156
=4;
(5)64-(7.2+5.9)
=64-13.1
=50.9;
(6)(75+240)÷(20-5)
=315÷15
=21;
(7)85.7-(15.3-4.8)
=85.7-10.5
=75.2;
(8)51.27-8.66-1.34
=51.27-(8.66+1.34)
=51.27-10
=41.27;
(9)10.75+0.4-9.86
=11.15-9.86
=1.29.
=(312+188)×4
=500×4
=2000;
(2)25×33×4
=25×4×33
=100×33
=3300;
(3)101×87
=(100+1)×87
=100×87+1×87
=8787;
(4)4000÷25-13×12
=160-156
=4;
(5)64-(7.2+5.9)
=64-13.1
=50.9;
(6)(75+240)÷(20-5)
=315÷15
=21;
(7)85.7-(15.3-4.8)
=85.7-10.5
=75.2;
(8)51.27-8.66-1.34
=51.27-(8.66+1.34)
=51.27-10
=41.27;
(9)10.75+0.4-9.86
=11.15-9.86
=1.29.
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