Thursday, 30 April 2015

Subtraction

We are learning how to solve subtraction problems

The soldiers shoelaces were eaten by rats. The shoelaces were 33cm and the rats ate 5cm. how long are the shoelaces now?
We solved it by splitting the 5 into 3 and 2.
33-3-2=28cm
We split numbers to solve subtraction problems efficiently.

Charlie cutting off the part the of the lace the rats ate.
Mac measuring his shoelaces after they have been attacked by rats.
Sienna checking her shoelaces. Will they be long enough now?
Sienna's thinking on the number line
Marshall choosing how much of the shoelace the rats chewed.
Jack and Ella measuring their shoelace
after working out 23cm-4cm using their counting back.
Erin and Whetu using their counting
back on a number line to solve the problem 31cm-4cm

We worked together to solve some word problems.
We made number lines and used our backwards counting in ones to figure out how many cm's of our shoelaces were left after being gnawed by gigantic rats in the trenches.
Kamora-Lee and Chahat working together
to problem solve
Nevaeh checking her counting back and
Riley measuring his chewed shoelace

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