Sagot :
bjr
m² dm² cm² mm²
• • • • • • • •
1 0 0 a) 1 cm² = 100 mm²
1 0 0 b) 1 dm² = 100 cm²
1 0 0 0 0 = 10 000 mm²
1 0 0 c) 1 m² = 100 dm²
1 0 0 0 0 = 10 000 cm²
1 0 0 0 0 0 0 = 1000 000 mm²
0 , 0 1 e) 1 cm² = 0,01 dm²
0, 0 0 0 1 = 0,0001 m²
Réponse:
a)1cm2= 1x100=100mm2
b)1dm²=1x100=100cm²= 100x100=10 000mm²
c) 1m²=1x100=100dm²=100x100=10 000cm²
d)1dm²=1÷100=0.01m²
e)1cm²0,01dm²=0,0001m²
f)1mm²=0,01cm²=0,0001dm²=0,0000001m²
Explications étape par étape:
Km hm dac m dm cm mm
Km² hm² dac² m² dm² cm² mm²
D'abord tu dois savoir que
1cm=10mm 1cm
=1x10=10
Alors 1cm²=100mm²
=1x100=100