a. 2 1/4 + 6 × 3 2/3 - 12 =
b. 0,8 + 2/5 ÷ (1 1/2 - 0,75) × 1 1/4 =
b. 0,8 + 2/5 ÷ (1 1/2 - 0,75) × 1 1/4 =
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Jawab:
Penjelasan dengan langkah-langkah: A. 2 1/4 + 6 × 3 2/3 - 12
= 2 1/4 + 6 ×2 - 12
= 2 1/4 +12 -12
= 2 1/4
= 9/4 , 2,25
B. 0,8 + 2/5 ÷ ( 1 1/2- 0,75)× 1 1/4
= 4/5+2/5÷(3/2-3/4)×1/4
= 4/5+2/5÷3/4×1/4
= 4/5+2/5×4/3×1/4
= 4/5+2/5×1/3
= 4/5+2/15
= 14/15
= 0,93
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