(21+12/7)÷3/7=过程完整
1个回答
(21+12/7)÷3/7=
(21+12/7)x7/3=
(7+4/7)x7=
49+4=53
相关问题
4/15÷[(4/7+4/21)×7/12]=?
12.48-21.28÷7.6x3.1 计算
指出并改正题中错误1.9÷3/7=9÷7/3=21错误:改正:2.9×3/7=9×7/3=21错误:改正:3.9÷3/7
8/7÷4/21= 3/25*5/9= 2/3-1/2= 24*(7/12+1/8)=
填上合适的数: 7÷9=______ 5 2 7 =______ 6 21 = 12 () = () 7
12.48-21.28÷7.6×3.1 要脱试
( 4 7 + 1 3 )÷21= 4 7 ÷21+ 1 3 ÷21,这是运用了( ) A.乘法交换律 B.乘法结合律
3/4+3×7/6=? 5/7÷3-2/21=?
25+37= 21.7÷7= 3 5 × 5 12 = 25× 4 5 = 70-34= 12.3+=1.23= 1 4