1. Hitunglah ! a. 51 + 17 - 62 b. 21 - ( -5 ) + 17 c. -42 - 6 + 19 d. -53 - ( -54 ) - 19 e. 14 x 9 : ( -3 ) f. -24 : ( -6 ) x 12 g. 2 1/2 - 4 1/5 + 1 2/3 h. - 4

a. 51 + 17 - 62 = 68 - 62 = 6
b. 21 - (-5) + 17 = 21 + 5 + 17 = 26 + 17 = 43
c. -42 - 6 + 19 = -48 + 19 = -29
d. -53 - (-54) - 19 = -53 + 54 - 19 = 1 - 19 = -18
e. 14 x 9 : (-3) = 14 x (-3) = -42
f. -24 : (-6) x 12 = 4 x 12 = 48
g. 2 1/2 - 4 1/5 + 1 2/3 = 5/2 - 21/5 + 5/3 = 75/30 - 126/30 + 50/30 = -1/30
h. -4 5/7 + 2 1/9 + (-1 1/3) = -33/7 + 19/9 - 4/3 = -297/63 + 133/63 - 84/63 = -248/63 = - 3 59/63

1. Jawaban dan cara =>
a. 51 + 17 - 62
= 68 - 62
= 6
b. 21 - ( -5 ) + 17
= 21 + 5 + 17
= 43
c. -42 - 6 + 19
= -48 + 19
= -29
d. -53 - ( -54 ) - 19
= -53 + 54 - 19
= 1 - 19
= -18
e. (( 14 x 9 )) : ( -3 )
= 126 : ( -3 )
= -42
f. ( -24 : ( -6 )) x 12
= 4 x 12
= 48
g. 2 1/2 - 4 1/5 + 1 2/3
= 5/2 - 21/5 + 5/3
= 75/30 - 126/30 + 50/30
= -1/30
h. - 4 5/7 + 2 1/9 + ( - 1 1/3 )
= - 33/7 + 19/9 - 4/3
= - 297/63 + 133/63 - 84/63
= - 248/63
= - 3 59/63