47
1×6+6×0×7+4+7+4×9
1个回答
相关问题
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口算6×5= 8×9= 24-8= 6×9= 7+9= 7×7= 4×8= 38+7= 4×9= 56+6= 91-40
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如何计算下题: 1×2×3+2×3×4+3×4×5+4×5×6+5×6×7+6×7×8+7×8×9+……+n×(n+1)
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计算:1×2+2×3+3×4+4×5+5×6+6×7+7×8+8×9=______.
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计算:1×2+2×3+3×4+4×5+5×6+6×7+7×8+8×9=______.
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计算:1×2+2×3+3×4+4×5+5×6+6×7+7×8+8×9=______.
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计算:1×2+2×3+3×4+4×5+5×6+6×7+7×8+8×9=______.
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0.9×0.5= 0.7×0.8= 0.6×1.2= 1.7×0.3= 0.1×9.2= 0.4×1.3= 0.7×1.
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直接写得数12.7-(8.65+2.7) 92.5×0.25×4 6.7×0.9+6.7×0.1 8.25×9.9+0.
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算一算.7×2-2= 4×9+9= 3×8-3= 3×6+3= 7×4+4= 4×9-9= 5×8+8= 6×3-6=
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口算:6×7=______; 9×9=______; 3×6=______; 2×6=______; 8×3+4=___