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怎样简便就怎样计算.55+260+140+245102×99645-180-245382×101-38235×8+35×6-4×35.
题目详情
怎样简便就怎样计算.
55+260+140+245 | 102×99 | 645-180-245 |
382×101-382 | 35×8+35×6-4×35. |
▼优质解答
答案和解析
(1)55+260+140+245,
=(55+245)+(260+140),
=300+400,
=700;
(2)102×99,
=(100+2)×99,
=100×99+2×99,
=9900+198,
=10098;
(3)645-180-245,
=645-245-180,
=400-180,
=220;
(4)382×101-382,
=382×(101-1),
=382×100,
=38200;
(5)35×8+35×6-4×35,
=35×(8+6-4),
=35×10,
=350.
=(55+245)+(260+140),
=300+400,
=700;
(2)102×99,
=(100+2)×99,
=100×99+2×99,
=9900+198,
=10098;
(3)645-180-245,
=645-245-180,
=400-180,
=220;
(4)382×101-382,
=382×(101-1),
=382×100,
=38200;
(5)35×8+35×6-4×35,
=35×(8+6-4),
=35×10,
=350.
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