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解:4又7/18-2又3/4-1又7/8等于( -17/72 )
∵已知需求出4又7/18-2又3/4-1又7/8等于多少
∴4又7/18 - 2又3/4 - 1又7/8
= (4×18+7)/18 - (2×4+3)/4 - (1×8+7)/8
= 79/18 - 11/4 - 15/8
= (79×4)/(18×4)-(11×18)/(4×18)-(15×9)/(8×9)
= 316/72 - 198/72 - 135/72
= 118/72 - 135/72
= -17/72
答:4又7/18-2又3/4-1又7/8等于-17/72
∵已知需求出4又7/18-2又3/4-1又7/8等于多少
∴4又7/18 - 2又3/4 - 1又7/8
= (4×18+7)/18 - (2×4+3)/4 - (1×8+7)/8
= 79/18 - 11/4 - 15/8
= (79×4)/(18×4)-(11×18)/(4×18)-(15×9)/(8×9)
= 316/72 - 198/72 - 135/72
= 118/72 - 135/72
= -17/72
答:4又7/18-2又3/4-1又7/8等于-17/72
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