3/2
2/15
16/21
2/3×6×3/8,3/10×4/7×7/9,4/5×4/7×5/12,等于多少?
3个回答
相关问题
-
3 4 ×12 = 5 7 × 2 7 = 2 3 × 3 4 × 1 8 = 1 10 × 1 4 = 2 9 × 5
-
简便计算． 4 5 × 3 8 + 4 5 × 1 2 (3× 5 12 )×4 3 7 × 2 9 × 7 8 4 9
-
计算：1×2+2×3+3×4+4×5+5×6+6×7+7×8+8×9=______．
-
计算：1×2+2×3+3×4+4×5+5×6+6×7+7×8+8×9=______．
-
计算：1×2+2×3+3×4+4×5+5×6+6×7+7×8+8×9=______．
-
计算：1×2+2×3+3×4+4×5+5×6+6×7+7×8+8×9=______．
-
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=
-
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)
-
计算下列各题． 3×4+2= 4×3+5= 3×6+4= 8×9+7= 4×7-6= 2×9-8= 3×8-4= 4×9
-
1+2+3+4+5+6+7+8+9+10×1×2×3×4×5×67×8×9×10=