1. 直接写出得数。(每题 1★)
$217 + 354 = $ $94 + 487 = $ $456 + 321 = $
$940 - 350 = $ $376 - 214 = $ $722 - 198 = $
$15×7 = $ $14×8 = $ $55×6 = $
$217×3 = $ $123×6 = $ $489×0 = $
$296×4 ≈$ $793×5 ≈$ $199×9 ≈$
$\frac{11}{15} - \frac{4}{15} = $ $\frac{7}{13} + \frac{3}{13} = $ $\frac{13}{23} - \frac{8}{23} = $

571 581 777 590 162 524 105 112 330 651 738 0 1200 4000 1800 $\frac{7}{15}$ $\frac{10}{13}$ $\frac{5}{23}$

2. 列竖式计算。(每题 4★)
$926 - 187 = $ $753 + 588 = $ $369×7 = $



$600 - 189 = $ $405×6 = $ $380×8 = $

739 1341 2583 411 2430 3040 (竖式略)

3. 脱式计算。(每题 4★)
$674 + 129×5$ $6×(341 - 254)$ $451 + 72÷8$

1319 522 460