用简便方法计算136*27+63*27+27136\times27+63\times27+2799*99+19999\times99+199 相关知识点: 试题来源: 解析 136 ×27+63 ×27+27 =(136+63+1)×27 =200 ×27 =5400 66I +66 ×66 00I +66+66 ×66= 00I +(I +66)×66= 00I +00I ×66= (I +66)×00I = =100 ×100 0000I...
知识点:乘法运算定律99 十 )14.$$ 199+99 \times 199+199+199+199 $$6 q + 15)15.$$ 5.4 \times 6+6 \times 15=6 \times(\overline{9}+ \underline{15}) $$16. 计算$$ ( 1 3 \times 1 2 5 ) \times 8 $$时,为了简便,可以先算($$ 125 \times 80 $$17.$$ 8 7 \times ...
(125 \times 8) \\ =10000 \div 1000 \\ =10 $$$ 3 8 + 1 9 8 - 3 7 \\ =38+(198-37) \\ =38+161 \\ =199 $$$ 4 9 0 0 \div ( 4 9 \times 4 ) \\ =4900 \div 49 \div 4 \\ =100 \div 4 \\ =25 $$$ 1 8 0 \div 3 2 + 1 4 0 \div 3 ...