1. 直接写出得数。(每题 1★)
$9 + 0.76 = $ $0.82 + 0.9 = $ $5 - 0.2 - 0.4 = $
$2.8 + 0.12 = $ $0.85 - 0.6 = $ $5.8 + 1.2 + 4.22 = $
$7.08 + 6.3 = $ $7.9 - 0.79 = $ $1.6 - 0.9 + 0.38 = $
$4.53 - 2.7 = $ $8.2 + 3.35 = $ $0.51 + (2 - 1.22) = $
$6.07 - 3.4 = $ $1.02 + 0.08 = $ $9.06 + (3.2 + 4.29) = $

9.76 1.72 4.4
2.92 0.25 11.22
13.38 7.11 1.08
1.83 11.55 1.29
2.67 1.1 16.55

2. 脱式计算。(每题 4★)
$7.38 + 51.6 - 0.46$ $85.7 - (26.23 + 43.7)$
$3.42 + (11.25 - 7.65)$ $28.76 - 9.68 - 3.51$
$6.9 + 33.24 + 76.58$ $22.12 - (11.35 - 3.96)$

58.52 15.77
7.02 15.57
116.72 14.73