Solve.
1 a. |
______ + 90 + 90 + 40 = 250
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1 b. |
30 + ______ + 10 + 60 = 130
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2 a. |
______ + 50 + 50 + 70 = 210
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2 b. |
90 + 80 + 10 + ______ = 230
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3 a. |
80 + 90 + 60 + _________ = 260
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3 b. |
80 + 60 + 60 + ______ = 290
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4 a. |
40 + 50 + 60 + ______ = 160
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4 b. |
______ + 30 + 20 + 70 = 170
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5 a. |
20 + 40 + 90 + ______ = 160
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5 b. |
30 + 50 + ______ + 80 = 190
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6 a. |
______ + 40 + 40 + 50 = 140
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6 b. |
90 + 80 + 30 + _________ = 280
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7 a. |
20 + ______ + 40 + 50 = 120
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7 b. |
______ + 30 + 80 + 30 = 230
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8 a. |
40 + 90 + ______ + 40 = 180
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8 b. |
______ + 70 + 30 + 40 = 200
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