The question is how much?

It is difficult to build a tall building without tamping the foundation.

1. Write the number directly.

49×34= 29×4= 42×5 14=

3 14×79= 736×2= 7×556=

34×0×79= 29×47×9=

2. Judges.

(1) A wire is taken as 17, that is, the whole length of the wire is taken as the unit "1". ( )

(2) A barrel of oil consumes 58kg, which is 58% of a barrel of oil. ( )

(3) A is 13 of B, which means that B is regarded as the unit "1". ( )

(4) Find the number of five 18, and the formula is 5× 18. ( )

(5) When a wire is 6 meters long, cut off its 12, leaving 5 12 meters. ( )