A.8 | B.5 | C.7 | D.1 |
A.111111 | B.1111111 | C.11111111 |
A.商不变的性质 | B.乘除法的关系 | C.小数的性质 |
A.5+15="15+5" | B.89+68+32=89+(68+32) |
C.12×5=5×12 | D.77×4×25=77×(4×25) |
A.![]() | B.![]() | C.![]() |
A.乘法交换律 | B.乘法结合律 | C.乘法分配律 | D.乘法交换律和乘法结合律 |
A.4.555... | B.5.666... | C.6.777... | D.7.888... |
A.99998900001 | B.999989000010 | C.9999890000100 | D.99998900001000 |
A.84×7﹣84×3 | B.84÷3﹣84÷7 | C.84÷(7﹣3) |
A.80 | B.110 | C.120 |