用递等式计算,能简便计算的要简便计算. 3.5×1.2÷3.5×1.2 &nbs...
用递等式计算,能简便计算的要简便计算.3.5×1.2÷3.5×1.25.43×7.2+7.2×4.5782×10.10.75÷0.3×0.8-0.3210.8+20.4÷...
用递等式计算,能简便计算的要简便计算. 3.5×1.2÷3.5×1.2 5.43×7.2+7.2×4.57 82×10.1 0.75÷0.3×0.8-0.32 10.8+20.4÷(5.2-3.5) 35×4.9+35×4.1+35.
展开
1个回答
展开全部
(1)3.5×1.2÷3.5×1.2
=(3.5÷3.5)×(1.2×1.2)
=1×1.44
=1.44;
(2)5.43×7.2+7.2×4.57
=(5.43+4.57)×7.2
=10×7.2
=72;
(3)82×10.1
=82×(10+0.1)
=82×10+82×0.1
=820+8.2
=828.2;
(4)0.75÷0.3×0.8-0.32
=2.5×0.8-0.32
=2-0.32
=1.68;
(5)10.8+20.4÷(5.2-3.5)
=10.8+20.4÷1.7
=10.8+12
=22.8;
(6)35×4.9+35×4.1+35
=35×(4.9+4.1+1)
=35×10
=350.
=(3.5÷3.5)×(1.2×1.2)
=1×1.44
=1.44;
(2)5.43×7.2+7.2×4.57
=(5.43+4.57)×7.2
=10×7.2
=72;
(3)82×10.1
=82×(10+0.1)
=82×10+82×0.1
=820+8.2
=828.2;
(4)0.75÷0.3×0.8-0.32
=2.5×0.8-0.32
=2-0.32
=1.68;
(5)10.8+20.4÷(5.2-3.5)
=10.8+20.4÷1.7
=10.8+12
=22.8;
(6)35×4.9+35×4.1+35
=35×(4.9+4.1+1)
=35×10
=350.
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询