Bài 1 : Viết số đo thích hợp vào chỗ chấma, 2,345m2 = .............dm22,345m2 = ...............cm22,345m2 = ...................mm2b, 5,26dm2 = ...............m25,26dm2 = .................cm25,26dm2 = .................mm2c, 12000cm2 = ..................dm212000cm2 = .....................m212000cm2 = ....................mm2d, 3,25m2 = .....................dm2Bài 2 : Tính bằng cách thuận tiện nhất14,23 + 7,06 -...
Đọc tiếp
Bài 1 : Viết số đo thích hợp vào chỗ chấm
a, 2,345m2 = .............dm2
2,345m2 = ...............cm2
2,345m2 = ...................mm2
b, 5,26dm2 = ...............m2
5,26dm2 = .................cm2
5,26dm2 = .................mm2
c, 12000cm2 = ..................dm2
12000cm2 = .....................m2
12000cm2 = ....................mm2
d, 3,25m2 = .....................dm2
Bài 2 : Tính bằng cách thuận tiện nhất
14,23 + 7,06 - 1,23
25m2 2500cm2= ..2525....dm2
15m2 9dm2 = ..150900...cm2
10dm2 6mm2=...10006...mm2
7km2 30m2= ....7000030..m2
58989cm2= ..5,8... m2.....9,8.... dm2.....9.....cm2
2080dm2=....20..m2...80..dm2
3107mm2= ...31..cm2...7....mm2
45908 m2 =.....4,5...hm2..9..dam2....8...m2
25m22500cm2= ..............2525..............dm2 15m29dm2 = ..........150900....................cm2 10dm26mm2=..............10006................mm2 7km230m2= .................7000030.............m2 58989cm2= ....58...... m2......98... dm2........9..cm2 2080dm2=......20..............m2.............80.......dm2 3107mm2= .......31.........cm2.........8..........mm2 45908 m2 =...45.....hm2...........9....dam2...8.....m2