15.口算
600÷50= | 420÷21= | 760÷40= | 350+80= | 1000÷25÷8= |
28×30= | 450÷45= | 660÷60 | 25×40= | 50×15+3= |
52÷13= | 25×11= | 2020÷20= | 300×6= | 40+360÷40= |
14.9888÷48=( )
A. | 206 | B. | 260 | C. | 26 |
13.已知总价和单价,求数量,用( )计算.
0 158506 158514 158520 158524 158530 158532 158536 158542 158544 158550 158556 158560 158562 158566 158572 158574 158580 158584 158586 158590 158592 158596 158598 158600 158601 158602 158604 158605 158606 158608 158610 158614 158616 158620 158622 158626 158632 158634 158640 158644 158646 158650 158656 158662 158664 158670 158674 158676 158682 158686 158692 158700 199269
A. | 加法 | B. | 乘法 | C. | 除法 |