(1) a) 30×4+20×4+10×4 = 240 cm
1.000 cm : 240 cm = 4 kerangka
b) 240 × 4 = 960 cm
1.000 cm - 960 cm = 40 cm
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(1) a) 30×4+20×4+10×4 = 240 cm
1.000 cm : 240 cm = 4 kerangka
b) 240 × 4 = 960 cm
1.000 cm - 960 cm = 40 cm