A.43.9×100+43.9 | B.43.9×(100+0.1) | C.43.9×0.1+43.9×100 |
A.加法交换律 | B.加法结合律 |
C.加法交换律和加法结合律 | D.无法确定 |
A.750÷(25×3)=750÷3÷25 |
B.13×98=13×100-2 |
C.37×102=100×37+2×37 |
D.120-6.42+3.42=120-(6.42-3.42) |
A.99×2.3=100×2.3-2.3 | B.135-56+44=135-(56+44) |
C.25×(4×8)×125=25×4+8×125 | D.720×4÷25=720÷(4×25) |
A.800÷25÷4=800÷(25×4) |
B.32.5-(7.8-2.9)=32.5-7.8+2.9 |
C.25×(40+4)=25×40×4 |
D.36×11=36×10+36 |
A.100×125+1 | B.125×100×1 | C.125×100+125 |
A.6.99 | B.5.99 | C.5.09 | D.6.01 | E.6.09 |
A.4.06 | B.0.406 | C.40.6 |
A. | B. |
C. | D. |
A.4 | B.13.7 | C.0.44 | D.26 |