), 36 million writing (
)。 2, from the unit, the first (
) is ten thousand, the first (
) It's one billion. 3. The angle between the hour hand and the minute hand at 6 o'clock on the clock face is (
At 9 o'clock, the angle between the hour hand and the minute hand becomes (
) angle. 4, a flat angle = (
) right angle
A fillet = (
) A flat angle 5. CE on electronic calculator is (
) key; Each bead above the abacus represents (
)。 6. Lei You (
) endpoint, line segment has (
) endpoint. 7. The "7" in the number 7004000 is in (
) bit, indicating (
)。 8. Rewrite the following numbers into numbers in units of "ten thousand" or "hundred million" (not the mantissa after omitting ten thousand digits of whole ten thousand or whole hundred million) 430000= (
) ten thousand
896000000≈(
) 9 billion, according to 50×6=
300 Write the product of the following questions directly: 50× 12=
(
)
25×6=
(
) 10, the speed of a car is 106 km.
), butterflies fly at a speed of 500 meters per minute.
)。 1 1、2
1
∠
1=
140 ,∠2=(
) 12、(
) × time
=
Distance,
Distance÷ (
) = time 1 13, you can draw (
) Ray, you can draw after two o'clock (
) straight line