A.720÷45×2 | B.720÷2÷45 | C.720÷2×45 |
A.38×100+3 | B.38×103-3 | C.38×100+38×3 | D.38×103-38×3 |
A.100×125+2 | B.100×125+2×125 | C.100×125×2 |
A.288÷18×2 | B.288÷6÷6 | C.288÷4÷9 |
A.4×7×5×3=(4×5)×(7×3) |
B.12×39+11×12=12×(39+11) |
C.56×7=7×56 |
D.1900÷4÷25=1900÷(4×25) |
A.102×56=(100+2)×56=100×56+2×56=5600+112=5712 |
B.41×61+39×41=41×(61+39)=41×100=4100 |
C.5×28+65×72=(35+65)×(28+72)=100×100=10000 |
A.25×(200+4)和25×200+25×4 |
B.36×201和36×200+36 |
C.265×105-265×5和265×(105+5) |
D.25×174×4和25×4×174 |
A.125×8+8 | B.125×8×2 | C.125×(8+2) |
A.(7×4)×25=7×25+4×25 | B.103×98=100+3×98 |
C.520-204=520-200+4 | D.125×32×25=(125×8)×(4×25) |
A.78×100-1 | B.78×100-78 | C.80×100 |