Answer:
1.144 cm²
2.
3.234 cm²
4.180 m²
5.250 m²
6.384 m²
Step-by-step explanation:
1.4×4=16 cm²
4×12=48 cm²
4×20=80 cm²
16+48+80=144 cm²
3.18×18=324 cm²
18-(6+9)+6=9
18-12=6
9×6=54
12×3=36
54+36=90 cm²
324-90=234 cm²
4.12×[(3×2)+(6×2)=216 m²
3×6×2=36 m²
216-36=180 m²
5.15×15=225 m²
5×5=25 m²
225+25=250 m²
6.16+8=24
24×16=384 m²
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Answers & Comments
Answer:
1.144 cm²
2.
3.234 cm²
4.180 m²
5.250 m²
6.384 m²
Step-by-step explanation:
1.4×4=16 cm²
4×12=48 cm²
4×20=80 cm²
16+48+80=144 cm²
2.
3.18×18=324 cm²
18-(6+9)+6=9
18-12=6
9×6=54
12×3=36
54+36=90 cm²
324-90=234 cm²
4.12×[(3×2)+(6×2)=216 m²
3×6×2=36 m²
216-36=180 m²
5.15×15=225 m²
5×5=25 m²
225+25=250 m²
6.16+8=24
24×16=384 m²