(1)2又23分之6×22(2)35×3又17分之13(3)4又17分之3×2又15分之2+14又15分之13×4又17分之3(4)(324又7分之1-810又6分之1+486.5)×4.2

Question

(1)2又23分之6×22 (2)35×3又17分之13 (3)4又17分之3×2又15分之2+14又15分之13×4又17分之3 (4)(324又7分之1-810又6分之1+486.5)×4.2

Answer 1

(1)2又23分之6×22=(52/23)x22=1144/23=49又17/23
(2)35×3又17分之13=35x(64/17)=2240/17= 131又13/17
(3)4又17分之3×2又15分之2+14又15分之13×4又17分之3
= (71/17)x(32/15)+(223/15)x(71/17)
= (71/17)[(32/15)+(223/15)]
= (71/17)x(255/15)
= (71/17)x17
=71
(4)(324又7分之1-810又6分之1+486.5)×4.2
=(7分之2269×4.2)-(6分之4861×4.2)+(486.5×4.2)
=1361.4-3402.7+2043.3
=3404.7-3402.7
=2